30 minutes if I have everything out and ready. A little more if I use the fozgometer and adjust azimuth or if its on an arm that I am not familiar with. I dont tweak that much after I get it set, unless I am hearing something I dont think is right. I might fool around with vtf and vta a little if the sound is too bright, or bass muddy, but I find most cartridges play their best level with the record and in the middle of the manufacturers recommended vtf range. there is more variance in pressure, humidity and maybe temperature than in .01 gram in vtf.
